Influence of Spontaneous Rhythm on Movement-Related Cortical Potential - A Preliminary Neurofeedback Study

2017 ◽  
pp. 90-98
Author(s):  
Lin Yao ◽  
Mei Lin Chen ◽  
Xinjun Sheng ◽  
Natalie Mrachacz-Kersting ◽  
Xiangyang Zhu ◽  
...  
Keyword(s):  
Cortical Potential ◽  
Spontaneous Rhythm

Do the minimum and maximum comfortable stimulation levels influence the cortical potential latencies or the speech recognition in adult cochlear implant users?

2021 ◽  
Vol 404 ◽  
pp. 108206
Author(s):  
Kelly Vasconcelos Chaves Martins ◽  
Maria Valéria Schmidt Goffi-Gomez ◽  
Robinson Koji Tsuji ◽  
Ricardo Ferreira Bento
Keyword(s):  
Speech Recognition ◽  
Cochlear Implant ◽  
Cortical Potential

scholarly journals Mapping Sensorimotor Cortex With Slow Cortical Potential Resting-State Networks While Awake and Under Anesthesia

Neurosurgery ◽  
2012 ◽  
Vol 71 (2) ◽  
pp. 305-316 ◽  
Author(s):  
Jonathan D. Breshears ◽  
Charles M. Gaona ◽  
Jarod L. Roland ◽  
Mohit Sharma ◽  
David T. Bundy ◽  
...  
Keyword(s):  
Brain Mapping ◽  
Sensorimotor Cortex ◽  
Resting State ◽  
Intractable Epilepsy ◽  
Cortical Potential ◽  
Data Driven ◽  
Resting State Networks ◽  
Seed Selection ◽  
Brain Organization ◽  
Slow Cortical Potential

Abstract BACKGROUND: The emerging insight into resting-state cortical networks has been important in our understanding of the fundamental architecture of brain organization. These networks, which were originally identified with functional magnetic resonance imaging, are also seen in the correlation topography of the infraslow rhythms of local field potentials. Because of the fundamental nature of these networks and their independence from task-related activations, we posit that, in addition to their neuroscientific relevance, these slow cortical potential networks could play an important role in clinical brain mapping. OBJECTIVE: To assess whether these networks would be useful in identifying eloquent cortex such as sensorimotor cortex in patients both awake and under anesthesia. METHODS: This study included 9 subjects undergoing surgical treatment for intractable epilepsy. Slow cortical potentials were recorded from the cortical surface in patients while awake and under propofol anesthesia. To test brain-mapping utility, slow cortical potential networks were identified with data-driven (seed-independent) and anatomy-driven (seed-based) approaches. With electrocortical stimulation used as the gold standard for comparison, the sensitivity and specificity of these networks for identifying sensorimotor cortex were calculated. RESULTS: Networks identified with a data-driven approach in patients under anesthesia and awake were 90% and 93% sensitive and 58% and 55% specific for sensorimotor cortex, respectively. Networks identified with systematic seed selection in patients under anesthesia and awake were 78% and 83% sensitive and 67% and 60% specific, respectively. CONCLUSION: Resting-state networks may be useful for tailoring stimulation mapping and could provide a means of identifying eloquent regions in patients while under anesthesia.

Extraction of the GVS electrical artifact from EEG recordings of the motor related cortical potential

2021 ◽  
pp. 109459
Author(s):  
Shelley, J Duncan ◽  
Marques Kamyla ◽  
Heather J Ferguson ◽  
David T Wilkinson
Keyword(s):  
Cortical Potential ◽  
Eeg Recordings

Phase resetting of spontaneously beating embryonic ventricular heart cell aggregates

1986 ◽  
Vol 251 (6) ◽  
pp. H1298-H1305 ◽  
Author(s):  
M. R. Guevara ◽  
A. Shrier ◽  
L. Glass
Keyword(s):  
Action Potentials ◽  
High Amplitude ◽  
Heart Cell ◽  
Cell Aggregates ◽  
Embryonic Chick ◽  
Phase Resetting ◽  
Stimulus Amplitude ◽  
High Stimulus ◽  
Very High ◽  
Spontaneous Rhythm

The influence of isolated 20-ms duration current pulses on the spontaneous rhythm of embryonic chick ventricular heart cell aggregates was studied. A pulse could either delay or advance the time of occurrence of the next action potential, depending on whether it fell early or late in the cycle. As the stimulus amplitude was increased, the transition from delay to advance occurred over a narrower range of coupling intervals. At low-stimulus amplitudes the transition from delay to advance occurred in a smooth continuous fashion; at medium-stimulus amplitudes the transition was discontinuous; at high-stimulus amplitudes graded action potentials were seen. It was impossible to annihilate spontaneous activity in aggregates with a single stimulus. The phase-resetting response to hyperpolarizing pulses was qualitatively the reverse of that produced by depolarizing pulses. A very high-amplitude depolarizing or hyperpolarizing pulse could produce rapid repetitive activity. Theoretical aspects of these phenomena are discussed.

Gestalt Closure and the Human Visual Evoked Cortical Potential

1978 ◽  
Vol 99 (2) ◽  
pp. 243-249
Author(s):  
William Z. Anthony ◽  
Jerry W. Lester
Keyword(s):  
Cortical Potential ◽  
Visual Evoked Cortical Potential ◽  
Visual Evoked

Somatosensory-evoked cortical potential during attacks of paroxysmal dysesthesia in multiple sclerosis

2005 ◽  
Vol 12 (3) ◽  
pp. 233-234 ◽  
Author(s):  
S. Toru ◽  
T. Yokota ◽  
H. Tomimitsu ◽  
T. Kanouchi ◽  
M. Yamada ◽  
...  
Keyword(s):  
Multiple Sclerosis ◽  
Cortical Potential

scholarly journals A cortical potential imaging study from simultaneous extra- and intracranial electrical recordings by means of the finite element method

NeuroImage ◽  
2006 ◽  
Vol 31 (4) ◽  
pp. 1513-1524 ◽  
Author(s):  
Yingchun Zhang ◽  
Lei Ding ◽  
Wim van Drongelen ◽  
Kurt Hecox ◽  
David M. Frim ◽  
...  
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Imaging Study ◽  
Cortical Potential ◽  
The Finite Element Method ◽  
Cortical Potential Imaging ◽  
Element Method
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